I intend to submit it. However, before I do it, it's wise to listen to the advise from our senior member here.

I still hold some confusion after reading the faq page regarding wall.
I take the extracting image from the official website, I wonder this will violate the rules here? Do I need to credit the person who share the brushes? or I musn't used any brushes in my wall?

Anyway, I'll like to share this with you all.
Any advise, comment, critic are all welcome.
Here is the walls:
link1
link2

what do you think? which one is better?

Mmmm,

The 3nd link is better (where the characters are in color). I would ask that you give us more of a description as to what you are going for in your wall. The images of the characters are rather small, I would see if you can find some higher quality pics of them in a larger format (try the AP gallery).
I like the bg color of light brown and the bamboo brushes are interesting, but can be reworked to make the bg more "zen." The large bamboo (though low opacity) are still blurry, as if you exaggerated the size of the default bamboo brush.
I would work on adding more texture and brushes to the overall bg and then play with layering effects (overlay, soft light, opacity etc).
Also, that lady floating in the wall seems misplaced and I would work on the brown bamboo brushes around her as well. They don't mesh well with the wall. You should submit this wall to Session Zero so others can comment on it; you would get more feedback there.

If you remember where you downloaded the brushes please credit. If not, fine. Let us know where you got the original scans from and anything that could be helpful to us as we critique your wall.

Thanks for your advise, I got a better ideas about what to do next. Honestly speaking, I make this wall in the midnight, ><lll Now that you mention it, then only I notice it. I'll put more effort this time, definitely gonna put it here again once I finished.

BTW, here is Session Zero right? AM I posting in wrong place?

There are two Session Zeros, one here on the forums, second is in the gallery.
I also think that the colored is better, the other one lost a lot on the quality, btw the chractzers would need some kind of shadow, they are just floating in the air :P